Level 3 — The system builds itself

What this level adds

At every level so far, when the system notices you've done something by hand more than once, you are still the one who builds the fix. Level 3 closes that loop: you approve a one-line suggestion, and the system writes the change itself, inside a sealed sandbox where mistakes can't touch anything that matters. A safety net checks the work before anything goes live, you give the final nod, and you get a short report afterward. The system that automates your work now automates extending itself.

Nothing here overrides the house rules from earlier levels — spending money, sending messages as you, and anything irreversible still require you, every time, no exceptions.

What you need

• Levels 0 through 2 already running — this level automates the tune-up habit, it doesn't replace the foundation under it.
• Comfort approving changes you don't personally write line-by-line, the way you'd sign off on a contractor's work rather than doing it yourself.
• A series of tinkering evenings rather than one sitting — this level accretes over weeks, not a single afternoon.

The honest cost

This level is for people who've already found Level 2 genuinely useful and want the compounding to go further — not a required destination.